<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style type="text/css">
        .container div {
            height: 600px;
        }
        
        .container .left {
            float: left;
            width: 200px;
            background-color: orange;
        }
        
        .container .center {
            min-width: 400px;
            background-color: rgb(0, 255, 106);
        }
        
        .container .right {
            float: right;
            width: 200px;
            background-color: rgb(76, 0, 255);
        }
    </style>
</head>

<body>
    <div class="container">
        <div class='left'>111111</div>
        <div class="right">1111111</div>
        <div class='center'>111111111</div>
    </div>
</body>

</html>